Some extra upgrades, not strictly needed for the electric conversion.
The hood prop normally attaches to the left hand radiator bracket when in the stored position. Rather than install the radiator bracket, I installed the Redline Tuning Hood QuickLIFT. The kit included pop rivets for the hood brackets. I used rivet nuts instead, to allow removing the bracket. Some rattle can paint matches the brackets to the car.
Red rally stripe knob, by SickSpeed. Leather shift boot and e-brake boot with red stitching from Redline Automotive Accessories.
Subaru part number 83037FE030. This switch came stock only with the 2007 STI Limited. Subaru made just 800 of those cars.
Here is how to remove the intake resonator ("chamber" in Subaru speak).
Use Subaru part 46059FA000 to plug the input hole. Subaru leaves blocking the output hole as an exercise.
|H4510FE030||Fog Lamp Kit|
|H4518FE100WG||Fog Lamp Trim Kit, Aspen White|
|H4518FE100WU||Fog Lamp Trim Kit, Satin White Pearl|
|H4518FE100TG||Fog Lamp Trim Kit, Premium Silver Metallic|
|H4518FE100LR||Fog Lamp Trim Kit, Urban Grey Metallic|
|H4518FE100VW||Fog Lamp Trim Kit, Obsidian Black Pearl|
|H4518FE100DJ||Fog Lamp Trim Kit, Newport Blue Pearl|
|H4518FE100BW||Fog Lamp Trim Kit, Aqua Blue Metallic|
|H4518FE100PG||Fog Lamp Trim Kit, WR Blue Mica|
|H4518FE100RO||Fog Lamp Trim Kit, Garnet Red Pearl|
Yellow fog light covers from Lamin-x.
Most aftermarket car stereos had most of the features I wanted, but only one had them all, the Pioneer DEH-4400HD. One key feature is how easy it is to tune the HD subchannels.
Synthetic gear oil in both the transmission and rear differential.
Mirror part number H501SAG100 fits Impreza 2002-2007. Mount adapter part number H501SSA040.
The 2006-2007 Impreza tail lights are mostly chrome. Tail lights should be red. The 2005 tail lights are red, and are a direct fit. The 2005 tail light part numbers are 84201FE241 and 84201FE251. Unlike most Subaru parts that are sold exclusively by dealers, these lights are widely available on the open market sold under the TYC brand name. TYC is the OEM supplier.
A hood from the non-turbo version of the car keeps rain off the electrics. The non-turbo car did not come in World Rally Blue, so this hood had to be painted.
The 2002-2007 WRX wing contains a Center High Mounted Stop Lamp (CHMSL), or "third brake light". Impreza without a wing have a CHMSL inside the cabin on the rear shelf/package tray. Most of these WRXs were originally constructed without a wing. WRX STIs and yellow painted WRXs left the factory with a wing. Dealers added wings to most WRXs that did not already have them and they left the existing CHMSL on the rear shelf in place and connected. Most 2002-2007 WRX sedans were sold with two CHMSLs.
To properly delete the redundant lamp, replace the rear shelf with part 65510FE100OE. This requires removing the:
To reduce current draw on the 12V system, I replaced some lamps with LEDs. I did not bother with lamps that are energized for short periods of time such as back up lights and turn signals. Unfortunately, the headlight low beams do not accommodate LED replacements, due to the size of the heat sinks and fans.
The SYLVANIA Automotive Lighting Guide was helpful to identify most of the lamps. A lot of LED lamps on the market are crap. I rejected 2-3 products for each location before settling on the selections below.
|Location||Type||Lamps||Product||Cost||Amps Before||Amps After||Amps Reduction|
|Fog||H3||2||Deyou Lighting DY-H3W-CRX-50W||$35||8.40||0.33||8.1|
|Brake (A)||7440||2||JLC 7440 7443 T20 Plasma||$32||3.48||0.38||3.1|
|Tail (B)||7443||2||JDM Astar Bright AX-2835||$17||0.84||0.26||0.6|
|Tail/Brake (C)||7443||2||Putco 247443R-360||$55||0.84/4.22||0.09/1.01||0.8/3.2|
|Center brake||P21W||1||Jtech 1156 BA15S 13W LED Red||$30||1.72||0.27||1.4|
|License||2825||2||Zone Tech 8-SMD T10 W5W||$10||0.66||0.08||0.6|
|Dome||DE3175||1||Cutequeen DE3175 16-SMD||$6||0.60||0.06||0.5|
|Trunk||168||1||Sylvania 168/194/2825 LEDriving||$11||0.36||0.06||0.3|
The lamp type in tail light location B is 7443, which is a dual filament lamp. The car drives only the dimmer of the two circuits in the lamp. A dual brightness LED lamp is not required in this position.
The center brake lamp in the spoiler is already LEDs. The lamp listed above is for the interior fixture.
The Custom Accessories 37000 steering wheel cover gives you the feeling of driving a Ferrari for just $6.
In its earlier days, this WRX was an unrefined, bare bones TR (Tuner Ready) without any fluff such as side spoilers. With a fancy new power plant, the car has graduated from knickerbockers to big boy trousers. Installing these items required drilling 10 holes along the sides of the sills. To figure those hole locations, I removed the side spoilers from a similar WRX and measured. The 12 holes underneath the sills exist already. They contained plastic plugs covered with undercoat. The side spoilers come in either the new curvy style or old straight style and in body color or black. I choose old black.
The front and rear badges got decal overlays from Auto City Imports.
The steering wheel got one too.
The badges next to the key lock were repainted with red accents instead of black and blue. To remove the badges, I heated them with a heat gun, then ran nylon line behind them with a sawing motion. To reapply, I used 3M heavy duty mounting tape.
Black and red seat covers from LeatherSeats.com. These covers are not leather, but vinyl. The seat covers were easy enough to do myself. The door panels were a bit trickier; I had an automotive upholstery shop do them.
The rims are from an older model of the Impreza WRX, the 2002-2004. They are painted gunmetal, with a red pinstripe. The rim size is 16x6.5, which is smaller than the original of 17x7. There was a slight interference with the big front brakes that was solved with a 5mm wheel spacer, the H&R 1025560. The pinstripe is 1/8in wide red Prostripe R20830. I applied the tape using a small piece of cardboard with a slit as a guide to keep it spaced even to the rim edge. The tires are a quiet running summer tire, the Continental ExtremeContact DW 205/55ZR-16.
The wiring is modified so that the fog lights can be turned on even when the headlights are turned off. This allows saving some power by using the LED fog lights as daytime running lights instead of the incandescent headlights. Normally when the headlight switch is off, the headlights are not off but merely dimmed by routing power through a power resistor (the DRL resistor). The resistor simply wastes some power so that the total used is the same as if the headlights were on at full brightness.
The first step is to unplug the DRL resistor. Now the headlights are either fully on or fully off. Then, reroute the wiring as shown in the diagram below. The basic idea is for power to come to the fog light relay coil from the parking switch instead of the high-beam relay. This way, the fog lights can be turned on when the headlight switch is in the first position. You can find detailed instructions on several Subaru forums. I did not ground the yellow-blue wire from the fog light switch. Grounding that wire allows the fog lights to remain on when the high beams are on.
The 2006-2007 WRX TR comes with plain black pedals. Upgrading the clutch and brake pedals to the WRX style is easy. The accelerator is a bit more difficult.
The clutch and brake pedals have covers with a hard rubber lip. They can be pulled off and replaced with the WRX covers, part 36024FA010. These pedal covers are often sold in a set of three, along with the accelerator pad, part 36024FA001. This accelerator pad is intended for earlier model years and does not fit the 2006-2007 Impreza accelerator assembly.
The 2006-2007 WRX STI accelerator assembly (part 36010FE040) fits the bill, almost. It is physically compatible and has the same electrical connector, but the connector pinout differs among the turbo, STI, and normally aspirated cars. The WRX TR stock accelerator assembly part number is 36010SA060.
To get around the wiring mismatch, the connector and sensor can be moved from the old assembly to the new assembly. Thus, the original connector and sensor remain in the car. Note that the service manual advises "Accelerator pedal cannot be disassembled." It is held together by Torx head screws to discourage you. Use this method at your own risk.
The new hybrid accelerator assembly produces slightly different voltages at the minimum and maximum positions. The difference is enough to require recalibrating the motor controller throttle input. If I were modifying the pedal in a gas car, I would recalibrate the ECU. Alteratively, the pedal stops could be trimmed or shimmed until the voltage range matches exactly.
|Position||Before||After||Difference||% of range|
The dead pedal is an aftermarket product, purchased from FastWRX. Subaru does not make a fancy dead pedal. The rubber pads are attached with weak double stick tape. The small pads come off easily. The remedy is to pull them out, remove the tape, and glue them. The metal is very smooth. Scoring with an awl helps the glue ahere. Acetone removes residue left from the tape.